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RE: XML 1.0 is simple. was: RE: almost four years ago....
- From: "Bullard, Claude L (Len)" <firstname.lastname@example.org>
- To: email@example.com, firstname.lastname@example.org
- Date: Fri, 15 Jun 2001 12:57:08 -0500
From: Eric van der Vlist [mailto:email@example.com]
"Bullard, Claude L (Len)" wrote:
>> Not historical but applicable. I can build with
>> XML plus DTDs and never touch an xmlns declaration.
>And I do build a lot using XML + namespaces without touching a DTD...
Yes. Same here. The difference is, the XML 1.0 spec does
not define namespaces. It probably should but that
argument has already been hashed to death.
>Simplicity and applicability are very subjective and application
But spec citation is rigorous.
> XML Base and XInclude? Good questions.
> I put them in the same layer with namespaces.
> Where would you put them?
>>Do you mean functional or procedural layers?
>I'd tend to put XInclude in the same functional layer than external
>parsed entities and XML Base with namespaces, exactly as I put modeling
>DTD in the same bag than W3C XML Schema...
Yes. If they are taught, that makes a good categorical class.
I put modeling a DTD in a slightly modified category because
one can put away the XML Schema but even XML can't put away
the DTD because pieces of the spec family depend on it. When
dividing up and naming a core, it is the procedural definition
(if I understand you) that I would use. XML 1.0 specs
well-formedness by syntax and validation by DTD. Everything
else is an add on. So functionality aside, that is core.
What I would do today is put it in an appendix and say, "learn
this when you need it right before SGML Declarations. Nice
to know they are there as the ultimate escape hatch, but the
student needs to know if they are dinking with the declaration,
they are in SGML, not XML, and if they are dinking with the
DTD, they are designing a language, not processing an instance.
Eventually, one should know about all of this stuff. Having
predicted DTDs would stick around for a long time, so far
so good. But frankly, I want to get on with XML Schemas
because they are a better modeling tool conceptually
even though having to write examples that keep the focus
on definition over instance is harder (Element elements and
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